Turbomachine with compressor diffuser bleed for uniform exit flow

A turbomachine comprising:

• a compressor configured to generate compressed air;
• a combustor disposed to receive the compressed air from the compressor through a flow path;
• a diffuser disposed in the flow path between the compressor and the combustor, the diffuser configured to direct the compressed air through the flow path;
• a deswirl section disposed in the flow path between the diffuser and the combustor and configured to receive the compressed air directed by the diffuser;
• a bleed system disposed to receive a portion of the compressed air as a feed air flow;
• and
• a plenum disposed between the bleed system and the flow path,
• wherein a number of bleed holes are disposed downstream in the flow path from the diffuser and are configured to direct the feed air flow away from the combustor,
• wherein the number of bleed holes are formed in a plural number of sizes and are configured to provide a uniform compressor exit flow distribution around a circumference of the diffuser,
• wherein the bleed holes are configured to provide the feed air flow to the plenum, where an amount of the feed air flow delivered to the plenum from each of the passages is approximately equal.

A turbomachine, comprising

• a compressor configured to generate compressed air;
• a combustor disposed to receive the compressed air from the compressor through a flow path;
• a diffuser disposed in the flow path between the compressor and the combustor;
• vanes distributed circumferentially around the compressor with a flow passage defined between each adjacent two of the vanes;
• and
• a cover defining a plenum;
• wherein a number of bleed holes extend through the cover and are disposed downstream in the flow path from the diffuser and are configured to direct a portion of the compressed air compressed by the compressor away from the combustor,
• wherein the number of bleed holes have a plural number of sizes configured to provide uniform compressor exit flow distribution around a circumference of the diffuser,
• wherein the bleed holes are disposed in the flow passages,
• wherein the bleed holes are configured to provide a feed air flow of the compressed air to the plenum, and
• wherein an amount of the feed air flow delivered to the plenum from each of the passages is approximately equal.